Question

In which direction do the following forces act when object is in motion :

Frictional force.

Gravitational force.

Answer 1

Frictionl force acts in the opposite direction of motion while in gravitational force it acts on the center of body

Answer 2

Frictional Force opposes the motion of the object so frictional force always act in opposite direction of motion.
Gravitational Force always acts on an object so that the objects attracts to towads the Earth's core (center).

Hope it helps...